Papanggorn Leumsai
I build things that move — automated machines on the workshop floor, and a marketplace platform called MiddleSpark on the web.
I'm a mechatronics engineering student who ended up building software too — not because I set out to, but because every hardware project I've built needed an interface, a dashboard, or a way for people to actually use it.
My work splits between physical automation — conveyors, pneumatics, CAD — and MiddleSpark, a peer-to-peer escrow marketplace I'm building from the ground up: concept, landing page, and demo.
Selected work
Two projects, two very different toolchains — one runs on compressed air, the other on Supabase.
MiddleSpark
A peer-to-peer escrow marketplace for trading things like game IDs and second-hand goods — a neutral middle step so buyer and seller don't have to trust each other blindly. Funds lock in on agreement, and release once the buyer confirms the item.
Automated Soap Packing Machine
A conveyor-fed packing rig with pneumatic actuation — designed in CAD, then built as a working prototype. It senses, positions, and packs product along the belt line with minimal manual handling.
Want to build something together?
Open to collaborating on hardware builds, web projects, or MiddleSpark itself.
Get in touch →What I work with
Mechatronics
CAD design, conveyor & pneumatic systems, prototyping and build.
Web development
Front-end builds and lightweight backends for product ideas.
Product
Marketplace & escrow mechanics, landing pages, iterative shipping.
Languages
Let's talk.
The fastest way to reach me is email — or send a quick note here and it'll open in your mail app, ready to send.
papangkornleumsai@gmail.com